A friend had a 12 fridge factory installed in his new '99 Pete. His son inherited the truck. In about '08 the son had to leave the truck, take the bird home.
The truck sat in a Texas truckstop for 4 days before I got there. I knew he only had normal starting batteries, so I expected to need to jumpstart the truck. When it started, I grabbed a trash bag, to clean all the spoiled food out. (Must of shut off to save batteries) I stole 1 of his ice cream bars, and headed out.
What has this got to do with RVs? Well, in over 2 decades I'm sure the fridge technology has improved. And I can't think of many places a RV fridge is likely to be stressed anymore than in a truckstop. And the truck rolls more in 6 months than most RVs over their lifetime.